Pattern mechanism for dobbies



i 1,622,344 March 1927- J, REYNOLPS a PATTERN MECHANISM FOR DOBBIES Fi dMar 21, 1925 s Sheets-Sheet 1 March 29 1927.

J. REYNOLDS PATTERN MECHANISM FdR DOBBIES Filed March 21, 1923 3Sheets-She et 2 March 29 1927.-

J. REYNOLDS PATTERN MECHANISM FOR DOBBIES FiIedMarQh 1925 5 Sheets-Sheet3 Patented Mar. 29, 1927.

UNITED STATES JOHN REYNOLDS, OF NEW BEDFOED, MASSACHUSETTS, ASSIGNOR T0BUTLER MTLL, OF

PATENT. OFFICE.

NEW BEDFORD, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS.

PATTERN MECHANISM FOR DOBBIES.

Application filed March 21, 1923.

My invention relates to a dobby loo-m attachment whereby moreparticularly bor dered fabrics such as handkerchiefs, napkins and thelike may be woven. Heretofore weaving of this character has been done bythe use of two cylinders each mounted on its own shaft operated from thesame worm gear. This mechanism has resulted in what I have found to bean unnecessary duplication of parts taking considerable room on theloom. My present improvement has been devised to simplify constructionand make a more compact and equally effective mechanism, and it consistsin the mounting of the two cylinders on the same axis in such a way thatwhile one of them is operating all the time the other may be operatedfrom time to time as occasion may require. Thus two short pattern chainsmay be used, economizing space and cost of construction.

My invention will be understood by means of the drawings in which it isshown in its preferred form, only so much of a loom be ing shown as isnecessary to make my invention understandable.

Figure 1' is a front elevation of a portion of a loom with my attachmentmounted thereon.

Fig. 2 is a front elevation of the cylinders and parts connectedtherewith as mounted on the side of the loom.

Fig. 3 is an enlarged detail of the cylinder mechanism in plan, and

Fig. 4 a longitudinal section thereof taken at right angles to Fig. 3.

1 indicates the frame on which the parts are carried. 2 is a so-calledjack which is pivoted as at 200 to the harness lever 3. There are anumber of these jacks and harness levers as is usual. The top and bottomof the jacks normally engage the top girt 4 and the bottom girt 5 andeach end of each jack carries hooks 6 and 7 as is usual, these hooksbeing adapted to engage a top knife 8 and bottom knife 9. These knives 8and 9 are attached to and operated by the rocker 10. Each top hook issupported upon the rod 11 which is engaged at its lower end by a finger12. Each bottom hook rests upon a finger 13,these fingers being pivotedon the Serial No. 628,529.

harness lever 3 being slotted and forked as at 16 to engage the rod 17.

My improvement comprises the cylinder mechanism shown especially inFigs. 2, 3 and 4. 18 is the shaft on which the other parts are mounted,this shaft being supported by hangers 19 below the frame;

On the shaft 18 is mounted a cylinder 20 of usual construction, that is,grooved to receive the elements of the chain 21. This chain is of theusual character and carries pins 22 as is usual, these 'pins beingarranged to engage and operate the fingers 12 and 13.

It will be understood that there are a number of harness levers andoperating mechanisms according to the size of the der is pinned to theshaft in such manner as to rotate with it. Free to turnonthe shaft 18 isa sleeve 25 which runs from a point near the flange 24 for some distancealong the shaft carrying at its further end a member 34 of a clutch. Tothis sleeve is fastened to turn therewith a second cylinder 26 in allrespects like the cylinder, 20 though varying therefrom in width ifdesired. Thesleeve 25 carries a worm gear 27 engaging with a worm 28which is of the usual character and is mounted upon shaft 29. 30 is aplate of usual construction having a notch therein, there being pivotedto a lug on the plate a latch 31, the tip or engaging end of the latchbeing'adapted to fit'into notches 32 on the hub of the worm gear 27 Thisconstruction forms a clutch by which the position of the sleeve may beadjusted with relation to the worm gear, which is sometimes desirable. Aspiral spring 33 surrounding the sleeve 25 keeps these parts normally incontact so that the worm gear 27 will cause the usual rotation of thesleeve 25 and cylinder 26.

'On the sleeve is also mounted one member 34 of a clutch the othermember of which comprises a notched guide plate 35 pinned to the shaft18 and a grooved collar 36 carrying a finger 361. The part 35 it will benoted is beyond the end of the sleeve 25and is pinned to the shaft 18,while the part 36 is free to rotate on the shaft 18. A collar 38adjustably mounted on the shaft 18 keeps these parts in proper relation.37 in the part 36 is adapted to receive a pin 39 attached to an arm 40on one end of the spring-controlled rod 41, 42 being the spring whichnormally holds the rod 41 in such position as to keep the finger 361 outof engagement with the member 34. This rod is mounted in a yoke piece 43adjustably attached by the bracket 44 to the frame 1. The rod 41 carriesat its other end an arm 45 to which is attached by a spring connection46 a strap 47 which passes over a pulley 48 mounted on the frame, theother end of this strap being suitably connected vith a hook 49 on thelower end of one of the herness levers 3, this construction being suchthat upon the movement of the upper end of the harness lever to the leftby one of the knives (see Fig. 1) the hook 49 will be lifted and thestrap 47 moved to turn the lever 45, this turning of the lever 45throwing the part 36 into connection with the part 34. It will be seentherefore that upon movement given to the proper jack 2 and impartedthrough it to its harness lever 3 the part 36 will be thrown intoconnection with the part 34, these two parts forming a clutch. Thesleeve .25 is always in motion and carries with it the part 34 so thatits engagement with the part 36 will cause the part 36 to be rotated andhence the plate 35 and the shaft to whichthe plate is connected.

As in all looms of this character the movement of the harnesses iscaused by motion given to the harness levers through the pins on thechain, the fingers and hooks, etc. In the present casechains are placedon both the cylinders 26 and 20, these chains being arranged with theusual pegs in such manner as to produce the desired pattern, and one setof pegs on the chain running over cylinder 26 is arranged to operatetheharness lever carrying the hook 49, so that at the desired time theshaft 18 will be connected to the sleeve 25 to turn with it. At othertimes only the sleeve and cylinder 26 are turned. Thus the cylinder 26and'its chain are connected to the sleeve as required by the pattern.Thus for example the cylinder 20 may be provided with a chain to controlthe weave of a cross border or pattern, while the cylinder 26 will beprovided with a chain to control the pattern of the side borders. Thecylinder 26 on the sleeve 25 is always operating so that the side borderis continuous. At the proper time the clutch 34, 36 is thrownautomatically by means of the pegs and harness lever carrying the hook49, etc. to connect the sleeve 25 with the shaft 18 and bothcylindersrun so that the cross border as well as the side border is woven. Thenthe cross border is finished the clutch 34, 36 is thrown out and whilethe weaving of the side border is continued, the centre of the fabric iswoven plain without figures.

I have shown a ratchet 51 mounted on the shaft 18 and engaged by aspring-controlled holding pawl 50 suitably mounted to prevent anyrearward rotation or movement of the shaft.

To one skilled in the art it will be apparent that my device is animprovement upon other devices for a similar purpose, and also that myinvention may be otherwise embodied.

lVhat I claim as my invention is 1. In a dobby mechanism adapted forweaving both a cross-wise pattern and a lengthwise pattern and havingpattern chains, a shaft carrying a cylinder adapted to carry one of saidchains and a sleeve concentric therewith adapted to carry another ofsaid chains, means for continuously operating said sleeve, and meanslocated onsaid shaft for temporarily and periodically connecting saidshaft with said sleeve.

2. In a machine of the .kind described, a

shaft carrying a cylinder, a sleeve on said, shaft, said sleeve alsocarrying a cylinder,

means for continuously operating said sleeve, and means for temporarilyconnecting said shaft with said sleeve whereby said shaft and itscylinder may be operated as desired, said means comprising a clutch,onemember thereof being attached to said sleeve and the other to saidshaft and means comprising, a harness lever whereby when said harnesslever is operated the members of said clutch will be thrown intoengagement.

3. In a machine of the kind. described, a shaft carrying a cylinder, asleeve on said shaft, said sleeve also carrying a cylinder, means forcontinuously operating said sleeve, means for temporarily connectingsaid shaft with said sleeve whereby said shaft and its cylinder may beoperated as desired, said means comprlsing a clutch, one member thereofbeing attached to said sleeve and the other to said shaft and meanscomprising a harness lever whereby when said harness lever is operatedthe members of said clutch will be thrown into engagement, and means foroperating said harness lever comprising a chain carried by the cylinderon said sleeve.

4. In a machine of the kind described, a shaft carrying a cylinder, asleeve on said shaft also carrying a cylinder, means for rotatingsaidsleeve, means whereby said sleeve may be connected to said shaft torotate it comprising a clutch one member of which is attached to saidsleeve and the other member slidably attached to said shaft, and meansfor causing the engagement of said clutch members comprising a harnesslever and means for operating it and connections between said harnesslever and the sliding member of said clutch, whereby when said harnesslever is rocked said clutch will be engaged. i x

5. In a machine of theki'nd described, a shaft carrying a cylinder, asleeve on sand shaft also carrying a cylinder, means for rotating saidsleeve, means whereby said sleeve may be connected to said shaft to r0-tate it comprising a clutch one member of which is attached to saidsleeve and the other member slidably attached to said shaft, and meansfor causing the engagement of said clutch members comprising a harnesslever and means for operating it and connections between said harnesslever and the sliding member of said clutch, whereby When said harnesslever is rocked said clutch Will be engaged, said connections comprisinga spring-controlled rockable rod carrying arms, one of said arms beingconnected to said movable clutch member and the other to said harnesslever.

6. In a machine of the kind described, a shaft carrying a cylinder andasleeve also carrying a cylinder mounted on said shaft, means forrotating said sleeve, and means for connecting said sleeve and saidshaft one of said members being connected tosaid harness lever to beoperated thereby.

7 In a machine of the kind described, two cylinders each carrying apattern chain, one cylinder being mounted on a shaft, the other cylinderbeing mounted concentrically'with said shaft, harness levers mounted tobe engaged by said chains, means for rotating said last-named cylindercontinuously, and means for rotating said first-named cylinderintermittent-ly whereby the chain on said continuously-rotating cylindermay be used to cause the Weavmg of a continuous border 4 pattern and thechain on said intermittentlyrotating cylinder may be utilized to causethe Weaving of the crosswise pattern.

JOHN REYNOLDS.

